package com.zhai.netty.book.chapter04.time;

import java.util.Date;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;


public class TimeServerHandler extends ChannelHandlerAdapter{
	private int counter;
	
	@Override
	public void channelRead(ChannelHandlerContext ctx, Object msg)
			throws Exception {
		ByteBuf buf = (ByteBuf) msg;
		byte[] req = new byte[buf.readableBytes()];
		buf.readBytes(req);
		String body = new String(req,"UTF-8").substring(0,req.length - System.getProperty("line.separator").length());
		System.out.println("The time server receive order : "+body
				+" ; the current is : "+ ++counter);
		String currentTime = "QUERY TIME ORDER".equalsIgnoreCase(body) ? 
				new Date(System.currentTimeMillis()).toString() : "BAD ORDER";
				
		currentTime = currentTime + System.getProperty("line.separator");
		ByteBuf resp = Unpooled.copiedBuffer(currentTime.getBytes());
		ctx.writeAndFlush(resp);
	}
	
	@Override
	public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
		ctx.flush();
	}
	
	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
			throws Exception {
		ctx.close();
	}
}
